Hydrogen fluoride CAS#7664-39-3

CAS Number: 7664-39-3
Chemical Formula: FH
Appearance: Colorless Liquid
Synonyms:

Hydrofluoric Acid, 48-52 Percent, Technical
Hydrofluoric Acid, 49 Percent, Electronic/CleanrooM Grade
Hydrofluoric Acid, 70 Percent, Technical

HS Code: 28111100
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Hydrogen fluoride CAS#7664-39-3

Hydrofluoric acid (HF) is an aqueous solution of hydrogen fluoride gas. At room temperature, it appears as colorless transparent to light yellow smoke liquid with pungent odor. It has a specific gravity of 0.98 which is slightly lighter than water. It has a boiling point of 19.4 °C, being highly volatile. It can release white smoke once placed in air. The aqueous solution containing less than 60% hydrogen fluoride appears as a colorless clear fuming liquid. Industrial products are usually aqueous solution containing 40 to 45% HF. It has pungent odor. It can react with sulfur trioxide or chlorosulfonic acid to generate fluoride sulfonic acid, and can react with halogenated aromatic hydrocarbons, alcohols, olefins, hydrocarbons to generate fluorine-containing organic compound. When being dissolved in water, it can produce highly corrosive acid, being medium-intensity acid. It is extremely smelly, being very toxic and is prone to cause ulceration when get touch with the skin with a severe extent being larger than any acids. If inhaled of its vapor, it can have fatal effects, thus strict attention should paid during usage.

Hydrogen fluoride Chemical Properties

Melting point	-35°C
Boiling point	105°C
density	1.15 g/mL at 25 °C(lit.)
vapor density	1.27 (vs air)
vapor pressure	25 mm Hg ( 20 °C)
Fp	112°C
storage temp.	Store at +5°C to +30°C.
solubility	very soluble in H2O, ethanol; soluble in ethyl ether
form	Liquid, Double Sub-Boiling Quartz Distillation
pka	3.17(at 25℃)
color	APHA: ≤10
Specific Gravity	1.15
Odor	Acrid, irritating odor
PH	3.27(1 mM solution);2.65(10 mM solution);2.12(100 mM solution)
PH Range	1
Water Solubility	soluble
Sensitive	Hygroscopic
Merck	14,4790
Exposure limits	Ceiling limit 3 ppm (～2.5 mg/m3) as F (ACGIH); TWA 3 ppm (MSHA and OSHA).
Dielectric constant	17.0（-73℃）
Stability:	Stable. Hygroscopic. Incompatible with glass, alkali metals, light metals, alkaline earth metals
InChI	1S/FH/h1H
InChIKey	KRHYYFGTRYWZRS-UHFFFAOYSA-N
SMILES	[H+].[F-]
LogP	0.1 at 20℃
CAS DataBase Reference	7664-39-3(CAS DataBase Reference)
NIST Chemistry Reference	Hydrogen fluoride(7664-39-3)
EPA Substance Registry System	Hydrofluoric acid (7664-39-3)

Safety Information

Hazard Codes	T+,C,T,Xn
Risk Statements	26/27/28-35-36/37/38-20/21/22
Safety Statements	26-36/37/39-45-7/9-36/37-28-36
RIDADR	UN 1790 8/PG 2
OEB	B
OEL	TWA: 3 ppm (2.5 mg/m3), Ceiling: 6 ppm (5 mg/m3) [15-minute]
WGK Germany	2
RTECS	MW7875000
Hazard Note	Corrosive
TSCA	TSCA listed
DOT Classification	8, Hazard Zone C (Corrosive material)
HazardClass	8
PackingGroup	II
HS Code	28111100
Storage Class	6.1B - Non-combustible, acute toxic Cat. 1 and 2 very toxic hazardous materials
Hazard Classifications	Acute Tox. 1 Dermal Acute Tox. 2 Inhalation Acute Tox. 2 Oral Eye Dam. 1 Skin Corr. 1A
Hazardous Substances Data	7664-39-3(Hazardous Substances Data)
Toxicity	LC50 (15 min.) in rats, guinea pigs: 2689, 4327 ppm (Rosenholtz)
IDLA	30 ppm

Product Application Of Hydrogen fluoride CAS#7664-39-3

Cleaning cast iron, copper, brass; removing efflorescence from brick and stone, or sand particles from metallic castings; working over too heavily weighted silks; frosting, etching glass and enamel; polishing crystal glass; decomposing cellulose; enameling and galvanizing iron; increasing porosity of ceramics. Its salts are used as insecticides and to arrest undesirable fermentation in brewing. Also used in analytical work to determine SiO2, etc.

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